Sofa



FIG. 1 is a front perspective view of a first embodiment of a sofa showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a front perspective view of a second embodiment of a sofa showing our new design;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a right side elevation view thereof.

Views of the sofa not shown in the figures form no part of the claimed design.

The brackets and broken lines in FIGS. 5-8 form no part of the claimed design and indicate that the sofa design also includes a love seat. 

CLAIM The ornamental design for a sofa, as shown and described. 